It will take about not minutes not hours not days even not moths but years it will take to get to space 4 or 5 years.
123.40351046845905 Earth years.
It takes about 50 years from earth to Pluto
1
Mercury's orbit of the sun take 88 Earth days so 0.24 Earth years
50 Earth Years and 1059 alien years.
lots
It takes 29.5 Earth Years
165 Earth Years
10000 years
1, it's why we have years
4 years
ANSWER:The light year is based upon Earth years. It would be 10 years. It would take the light 5 years to get to the mirror, and 5 years to travel back. ---So if we doing it today, we will see trough that mirror over 10 years the planet as today.